:root {
    --bg-dark: #f4f5f7;      /* page bg (light) */
    --card-bg: #ffffff;      /* cards/panels */
    --neon-blue: #4a6cf7;    /* accent (site blue) */
    --neon-red: #dc2626;     /* danger */
    --text-primary: #14161c; /* headings/text (dark) */
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --accent: #16a34a;       /* success (green) */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

header {
    text-align: left;
    margin-bottom: 40px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 20px;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.file-section {
    background-color: var(--card-bg);
    border: 2px dashed var(--border-color);
    padding: 40px;
    text-align: center;
    border-radius: 12px;
    margin-bottom: 30px;
    transition: border-color 0.3s;
    cursor: pointer;
}

.file-section:hover {
    border-color: var(--neon-blue);
}

.editor-main {
    display: none;
    /* 파일 업로드 후 표시 */
}

.metadata-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    gap: 24px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
}

.cover-image-container {
    position: relative;
    width: 200px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

#coverPreview {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

.info-fields {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

input[type="text"] {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px;
    border-radius: 6px;
    outline: none;
}

input[type="text"]:focus {
    border-color: var(--neon-blue);
}

.song-list-container {
    background-color: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.song-list-header {
    padding: 15px 20px;
    background-color: rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.song-item {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: background-color 0.2s;
}

.song-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.song-item.dragging {
    opacity: 0.5;
    background-color: var(--neon-blue);
    border: 2px dashed white;
}

.drag-handle {
    cursor: grab;
    color: var(--text-secondary);
    font-size: 1.2rem;
    padding: 0 10px;
    user-select: none;
}

.drag-handle:active {
    cursor: grabbing;
}

.song-name-input {
    background: transparent;
    border: 1px solid transparent;
    color: var(--neon-blue);
    font-size: 1.1rem;
    font-weight: bold;
    width: 100%;
    padding: 2px 5px;
    border-radius: 4px;
    margin-bottom: 2px;
    outline: none;
    transition: all 0.2s;
}

.song-name-input:hover {
    border-color: var(--border-color);
    background-color: rgba(0, 0, 0, 0.03);
}

.song-name-input:focus {
    border-color: var(--neon-blue);
    background-color: var(--card-bg);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.15);
}

.song-info {
    flex-grow: 1;
}

.song-name {
    font-weight: 600;
}

.song-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.btn {
    padding: 10px 20px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: opacity 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--neon-blue);
    color: var(--bg-dark);
}

.btn-danger {
    background-color: transparent;
    color: var(--neon-red);
    border: 1px solid var(--neon-red);
}

.btn-danger:hover {
    background-color: var(--neon-red);
    color: white;
}

.btn-success {
    background-color: var(--accent);
    color: white;
}

.actions {
    margin-top: 30px;
    display: flex;
    justify-content: flex-end;
    gap: 15px;
}

#fileInput,
#imageInput {
    display: none;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 30px;
    border: 1px solid var(--border-color);
    width: 80%;
    max-width: 800px;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.18);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.close-modal {
    color: var(--text-secondary);
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
}

.close-modal:hover {
    color: var(--neon-red);
}

.search-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.search-bar input {
    flex: 1;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px;
    border-radius: 6px;
    outline: none;
}

.search-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 15px;
    max-height: 350px;
    overflow-y: auto;
    padding: 5px;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
}

.result-item {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
    border: 3px solid transparent;
}

.result-item:hover {
    transform: scale(1.05);
    border-color: var(--neon-blue);
}

.loading-text {
    grid-column: 1 / -1;
    text-align: center;
    padding: 20px;
    color: var(--neon-blue);
}